Abrasive resistance of feldspathic porcelain and fluorapatite porcelain under simulated oral environment
YI Yuan-ping
ZHANG Shao-feng
GUO Jia-wen
TIAN Bei-min
ZHANG Zhen-zhen
WANG Qi
WU Xiao-hong
Abstract：AIM:To compare the wear resistance of feldspathic porcelain(FEP)and fluorapatite porcelain (FLP)in simulated oral environment.METHODS:10 rectangular samples of each group were subjected to wear test by means of three point bending method and the indentation method,the surface structure was observed by SEM after acid corrosion.6 disc shaped samples in each group were subjected to wear test by a wear machine under water lubrica-tion condition at the speed of 200 r/min and loading force of 10N.The wear volume and roughness were measured by the three-dimensional profiler scanner per 105 cycles.Surface morphology were observed by SEM after 105 ,7 ×105 , and 12 ×105 cycles respectively.EDX energy analysis was used to measure the basic composition and the proportion of the wear area.RESULTS:The volume loss,surface roughness of the two porcelains increased linearly with the wear process.The volume loss and surface roughness of FLP were higher than that of FEP at each measurement cycle.SEM images showed that there were many different sizes of pores on FLP surface.With the cyclic loading,the wear scar of the two materials became from sparse to dense.FLP was worn in the form of relatively small particles and relatively dense grooves.FEP was worn in the form of relatively big particles and relatively sparse grooves.There were visible particles adhered to the wear area.CONCLUSION:The wear resistance of fluorapatite porcelain is lower than that of feldspathic porcelain.
Keywords：dental ceramicwear3D profilingscanning electron microscopy
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 84-89,124 )